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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2492272161e9c9aa2b073cd375aad50e114f5744c24b6c4c94b6906492ac4d1' 
  AND token = 'vvqk0JkQOi1vgmnjBJiaDMA0YjeSyxPkUInh5+IeYGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}